Messages in this thread | | | Subject | Re: [patch v7 0/21] sched: power aware scheduling | From | Mike Galbraith <> | Date | Tue, 30 Apr 2013 11:56:03 +0200 |
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On Tue, 2013-04-30 at 11:49 +0200, Mike Galbraith wrote: > On Tue, 2013-04-30 at 11:35 +0200, Mike Galbraith wrote: > > On Tue, 2013-04-30 at 10:41 +0200, Ingo Molnar wrote: > > > > Which are the workloads where 'powersaving' mode hurts workload > > > performance measurably? > > > > Well, it'll lose throughput any time there's parallel execution > > potential but it's serialized instead.. using average will inevitably > > stack tasks sometimes, but that's its goal. Hackbench shows it. > > (but that consolidation can be a winner too, and I bet a nickle it would > be for a socket sized pgbench run)
(belay that, was thinking of keeping all tasks on a single node, but it'll likely stack the whole thing on a CPU or two, if so, it'll hurt)
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